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Finding the Fourth Proportional to 412,377.66, 618,663.32 and 128,053.53

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Solution

The fourth proportional to 412,377.66, 618,663.32 and 128,053.53 is: 192,110.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,377.66 : 618,663.32 = 128,053.53 : x
  2. Step 2: Convert to fraction form
    412,377.66/618,663.32 = 128,053.53/x
  3. Step 3: Cross multiply
    412,377.66x = 618,663.32 × 128,053.53
  4. Step 4: Simplify right side
    412,377.66x = 79,222,022,007.52
  5. Step 5: Solve for x
    x = 79,222,022,007.52/412,377.66
  6. Step 6: Final answer
    x = 192,110.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.